Model dv 2

Manufactured by Ametek

Sourced in United States

The Model DV-II is a versatile lab equipment designed for precise viscosity measurement. It employs a rotational principle to determine the viscosity of a wide range of fluid samples accurately.

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Lab products found in correlation

Model ms1, by Novasina (1 mentions) Colorflex ez spectrophotometer, by HunterLab (1 mentions)

Close spelling variants of this product

Model DV-II + Pro DV + II model LV viscometer Brookfield Digital Viscometer, Model DV-II Version 2.0 Model DV‐II + Viscometer, DV‐II + Pro Model viscometer DV-II

12 protocols using model dv 2

Rheological Characterization of DIM Solutions

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To obtain the rheogram, 50% w/w DIM solution was sheared continuously at 25 ºC with a maximum shear rate of 1.74 s -1 using a SC4-16 spindle (Model DV-II+, Brookfield, USA), and the corresponding forward and backward rheograms were recorded.
The viscosity of freshly prepared DIM solutions contained various amounts of mannitol and the reconstituted solutions of lyophilized DIM with mannitol were determined at 25 ºC by a viscometer (Model DV-II+, Brookfield, USA) using a SC4-16 at the rotational speed of 6 rpm. Those lyophilized DIMs were reconstituted to their prior concentration before the measurement. Suitable amount of mannitol was selected for further study. The reconstituted viscosity of 0.5% w/w to 2% w/w dried DIMs (with or without mannitol) obtained by different methods in deionized water were also investigated.

Burapapadh K., & Saokham P. (2021). Effect of drying methods on the physicochemical characteristics of dried mucilage from Dictyophora indusiata. Deleted Journal, 48(1), 79-89.

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Viscosity, color, and pH analysis of gelatin hydrolysates

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The viscosity of SW-modified gelatin hydrolysates was measured using a Brookfield Model DV-II+ (USA). In this measurement, a fixed volume of gelatin hydrolysates (5 mL) was added to the temperature control jacket cup, which was heated by a water bath to obtain the target temperature of 25 °C. The spindle S140 was employed with a speed of 12 rpm. The measurement was conducted in triplicate. For color measurement, the Cielab color space of the hydrolysates was determined using a reflectance colorimeter (Lovibond^® RT series, Tintometer Ltd., Amesbury, UK). The results were reported in three values, L *, a *, and b *, representing lightness, green-red, and blue–yellow, respectively. The values of pH were determined at 25 °C and repeated three times.

Ho T.C., Lim J.S., Kim S.J., Kim S.Y, & Chun B.S. (2023). In Vitro Biodegradation, Drug Absorption, and Physical Properties of Gelatin–Fucoidan Microspheres Made of Subcritical-Water-Modified Fish Gelatin. Marine Drugs, 21(5), 287.

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Viscosity Measurement of Samples

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During storage, the apparent viscosities of the samples were measured by a rotational Brookfield digital viscometer (Model DV‐II) equipped with a spindle‐LV4. The experiments were conducted under stable conditions: a shear rate of 30 rpm at 30 s and at a temperature of 10°C.

Yekta M, & Ansari S. (2019). Jujube mucilage as a potential stabilizer in stirred yogurt: Improvements in the physiochemical, rheological, and sensorial properties. Food Science & Nutrition, 7(11), 3709-3721.

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Physicochemical Evaluation of MSN-FP Nasal Spray

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MSN-FP nano nasal spray was checked for its physical properties. There on, 1% dispersion prepared in an aqueous medium was tested for pH by using a digital pH meter (Xylem Analytics, GmbH & Co. KG, WTW-Weilheim, Germany). The formulated MSN-FP nano nasal spray was evaluated for its viscosities at 0.5, 1, and 2 rpm by the using Brookfield viscometer (Model DV-II) using Spindle #21.

Mehmood Y., Shahid H., Rashid M.A., Alhamhoom Y, & Kazi M. (2022). Developing of SiO2 Nanoshells Loaded with Fluticasone Propionate for Potential Nasal Drug Delivery: Determination of Pro-Inflammatory Cytokines through mRNA Expression. Journal of Functional Biomaterials, 13(4), 229.

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Comprehensive Food Quality Assessment

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Water activity (a_w) was measured by a portable water activity meter (Novasina Model MS1, Switzerland) at room temperature (25 °C). The pH value was measured using a pH meter (Eco Met P25 Istex, Inc., Seoul, Korea) at room temperature (25 °C). Relative viscosity was determined by a rotational viscometer (Model DV-II, Brookfield, Middleborough, KY, USA) with an RV spindle no.2 at a speed of 1 g under room temperature (25 °C). The color was determined using a colorimeter (Color Flex EZ spectrophotometer, HunterLab, VA, USA) with a pulsed xenon lamp as a light source. The color values were expressed in the CIELAB parameter, where L*, a*, and b* are the lightness, redness, and yellowness, respectively.

Sinchaipanit P., Sangsuriyawong A., Visetchart P, & Nirmal N.P. (2023). Formulation of Ready-to-Eat Soup for the Elderly: Nutritional Composition and Storage Stability Study. Foods, 12(8), 1680.

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Characterizing MSN-MF Nano-Nasal Spray

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The MSN-MF nano-nasal spray was checked for its physical properties. One percent dispersion prepared in the aqueous medium was tested for pH by using a digital pH meter (Ino lab WTW 730, United States). The formulated MSN-MF nano-nasal spray was evaluated for their viscosities at 0.5, 1, and 2 rpm by using the Brookfield viscometer (Model DV-II) using Spindle #21.

Mehmood Y., Shahid H., Barkat K., Ibraheem M., Riaz H., Badshah S.F., Chopra H., Sharma R., Nepovimova E., Kuca K., Valis M, & Emran T.B. (2023). Designing of SiO2 mesoporous nanoparticles loaded with mometasone furoate for potential nasal drug delivery: Ex vivo evaluation and determination of pro-inflammatory interferon and interleukin mRNA expression. Frontiers in Cell and Developmental Biology, 10, 1026477.

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Viscosity Measurement of Formulations

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The viscosity of all formulations was determined using a Brookfield viscometer (Model DV-II+, Middleboro, MA, USA) with a spindle number of 4 at 10 rpm.

Krishnappa M., Abraham S., Furtado S.C., Krishnamurthy S., Rifaya A., Asiri Y.I., Chidambaram K, & Pavadai P. (2024). An Integrated Computational and Experimental Approach to Formulate Tamanu Oil Bigels as Anti-Scarring Agent. Pharmaceuticals, 17(1), 102.

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Colour and Viscosity Measurement Protocol

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Colour measurements were conducted following our previous study with slight modification [3 (link)]. Briefly, we used a portable spectrophotometer, Lovibond RT series, Amesbury, UK. For each operation time, white and black colour standards were used to calibrate the instrument. Viscosity was analysed using a viscometer (Model DVII-Brookfield, Middleboro, MA, USA) with a small S52 adapter. In all the samples, 24 ± 1 °C temperature was maintained using a water bath.

Roy V.C., Park J.S., Ho T.C, & Chun B.S. (2022). Lipid Indexes and Quality Evaluation of Omega-3 Rich Oil from the Waste of Japanese Spanish Mackerel Extracted by Supercritical CO2. Marine Drugs, 20(1), 70.

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Viscosity Measurement of Fruit Juice

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Viscosity was measured in fruit juice samples at 7˚C using a Brookfield digital viscosity (Model DV-II+VISCOMETER, Spindle-00). The speed was set from 3 to 50 rpm. Three reading, 30s apart, were recorded for each sample.

Farrag A.M., Nasef H., Mohamed E., El-Aziz S.E.A., Shehata N.F., & Ibrahim G. (2020). Evaluation Quality of Guava Juice Fortified with Probiotic. Middle East Journal of Applied Sciences.

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Foaming and Viscosity Characterization

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Foaming properties, including foaming capacity (FC) and foam stability (FS), were determined by the method of Shahidi et al. [10] (link) with the minor modifications made by Wang et al. [11] (link). Foaming capacity was calculated using the following equation: FC %= (V-V0/V0) × 100 Where V and V0 are the volumes immediately measured after whipping and before whipping, respectively.
2.3.5. Apparent viscosity.
Apparent viscosity was measured at different temperatures using a Brookfield digital viscometer (Model DV-II, Canada) fitted with spindle 3 at 200 rpm with 1% (w/v), and apparent viscosity was expressed as cp and different rpm fitted with spindle 0.

Akl E.M., Taha F.S., Mohamed S.S., & Mohamed R.S. (2021). Characterization of Garden Cress Mucilage and its Prophylactic Effect Against Indomethacin-Induced Enter-Colitis in Rats. Biointerface Research in Applied Chemistry, 11(6), 13911-13923.

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